Genuine Question!! Pls answer x

​Hi guys,
​My ovulation day was like 5 days ago. Yesterday I threw up as soon as I woke up and today I feel sooooo tired. Like I was falling asleep at my friends house while talking, kinda tired. 
​This is gonna sound crazy and maybe I'm just BFP obsessed. When is the earliest I can test? Can you get symptoms THAT early??? 
​Has anyone heard of having pregnancy symptoms THAT early on? Am I going crazy? :(
​If a selection of you could answer or please kindly advise I would be so grateful. My husband is trying to tell me to not think about it as much but it is soooo hard.
​Look forward to hearing from ANY of you.
​Good luck to you all x